How to send image from webservice to website

[GeertVerhoeven]

Hi all,

I have a webservice that creates an image. I want to show the result of that image on my website. The website and webservice are on different servers. There is a VPN line between both servers.

What is the best way to sent the image to my website?
- save the file on a share
- sent a stream from the webservice to the site (if it is possible to do)
- save the file to

http://websiteserver/tempfolder

(if possible)
- ...

Thanks in advance,

Geert

 

[TJRTech]

I would have the server side of your web page do the following:

- Invoke the webservice method for generating the image

- Have the webservice method return a URL to the newly created image

- Have the ASP server-side code pull the file locally to a point it can publish using HTTP get.

I suspect trying to PUSH the file from the webservice to the website will give you headache, as will trying to return it as a stream. Your Webservice is hosted via ASP.NET so sharing the newly generated file as an image to be gotten is pretty easy.

TJR

 

[RTomes]

If the client machine is A:
Webserver is on server B:
Images are on server C:

(A) may have access to (B) while (A) does not have access to (C).
If this is the scenerio then you will have to move the Bytes as a stream from (C) to (B) so (B) can serve it to (A).

In your web page you point the image to a dynamic aspx rather then a hard file. The aspx below will act as if you were requesting the image directly from server (C).

<img src="showimages.aspx?imagename=house.jpg" />

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'Put user code to initialize the page here
        Dim outPutFormat As System.Drawing.Imaging.ImageFormat = System.Drawing.Imaging.ImageFormat.Jpeg
        Dim contType As String = "image/jpeg"
        Dim ImageName As String = Request("ImageName")
        Dim stmMemory As IO.MemoryStream = New IO.MemoryStream
        Dim myimg As System.Drawing.Bitmap = New System.Drawing.Bitmap("E:\somefolder\" & ImageName)
        Response.Clear()
        Response.ContentType = contType
        myimg.Save(stmMemory, outPutFormat)
        stmMemory.WriteTo(Response.OutputStream)
        Response.End()

    End Sub

 

[BoulderBum]

The web service should be able to send a serialized bitmap if you don't want to actually store the image to disk anywhere.

It would look something like:

//page load
Bitmap bmp = myService.GetImage( "some argument" );
bmp.Save( Response.OutputStream, ImageFormat.Jpeg );